Using XR20-W on 5-axis machines (mp4)
Off axis measurement works by synchronising movement of rotary and linear axes so that the laser measurement beam is aligned throughout the test. Because the linear axis is moving, the measurements made by the XR20-W may include additional angular errors (eg. pitch) from the linear axis. These contributory angular errors are then measured separately (using XL-80 and angular optics) and removed from the initial rotary axis results. The end result is a set of data reflecting the errors from the rotary axis alone.